package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 菜品服务实现类
 *
 * @author Moozy 2025/4/15 21:50
 **/
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 菜品添加
     *
     * @param dishDTO
     * @return
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        // 保存菜品基本信息
        dishMapper.insert(dish);
        // 保存口味表信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()) {
            Long dishId = dish.getId();
            flavors.forEach(flavor -> {
                flavor.setDishId(dishId);
            });
            // 批量插入口味数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }


    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        // 查询菜品数据
        Page<DishVO> p = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(p.getTotal(), p.getResult());
    }

    /**
     * 菜品批量删除
     *
     * @param ids
     * @return
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否能够删除 （启售的菜品不能删除）
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (StatusConstant.ENABLE.equals(dish.getStatus())) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        // 判断当前菜品是否能够删除 （与套餐关联的菜品不能删除）
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds != null && !setmealIds.isEmpty()) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        // 删除菜品
        dishMapper.deleteBatch(ids);
        // 删除菜品口味数据
        dishFlavorMapper.deleteBatchByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        // 查询
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        // 封装
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品及口味信息
     *
     * @param dishDTO
     * @return
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        // 修改菜品基本信息
        dishMapper.update(dish);

        // 删除原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        // 保存新口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()) {
            Long dishId = dish.getId();
            flavors.forEach(flavor -> {
                flavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品启售/停售
     *
     * @param status
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        return dishMapper.getByCategoryId(categoryId);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
